1. They began building this house 2 months ago They have . 2. My father started to work in this factory last week My father has. 3. He started living in Ho Chi Minh city when he was 8 He has . 4. He learnt English when he was 18 He has . 5. They have worked in that factory for five years. They began .. 6. We have learnt English for four years. We started............................................................................................................................. 7.My father started to give up smoking last year. My father has.......................................................................................................................... 8.They have worked in that factory since 2001. They started........................................................................................................................... 9. Lan hasn't written to Maryam for a month. Lan didn't.............................................................................................................................. 10. He has lived in Ha Noi since he was 12. He started.............................................................................................................................. 11. I haven't met her for a long time. I didn't...................................................................................................................................... 12. How long have you learnt French ? How long ago........................................................................................................................? 13. How long have you bought this car ? -->When did..........................................................................................................................? 14. When did you start to listen to classical music ? -->How long ..........................................................................................................................? 15. I saw her 10 years ago. I haven't..................................................................................................................................